Jens Gebhardt

US Patent:

20030006298, Jan 9, 2003

Filed:

Jul 6, 2001

Appl. No.:

09/899218

Inventors:

Jens Gebhardt - Columbia SC, US

International Classification:

F02M047/02

US Classification:

239/089000

Abstract:

An oil activated fuel injector control valve which reduces bouncing of the spool and an impact of the spool on an open coil. This eliminates shot by shot variations in the fuel injector as well as increasing the efficiency of the fuel injector. The fuel injector includes a valve control body which has a vent holes which prevent air from mixing with the working fluid. In this manner, the working fluid does not have to compress and/or dissolve the air in the working ports prior to acting on the piston and plunger mechanism in an intensifier body of the fuel injector.

US Patent:

20040011900, Jan 22, 2004

Filed:

Mar 26, 2003

Appl. No.:

10/396364

Inventors:

Jens Gebhardt - Columbia SC, US
Martin Luedicke - Columbia SC, US
Bernd Niethammer - Blythewood SC, US

International Classification:

B05B001/30

US Classification:

239/585100

Abstract:

An oil activated fuel injector includes a control valve body with end cap solenoids and a slidably mounted spool. A minimized contact surface area exists between the spool and one of the first and second solenoid coils providing a minimized ratio of surface area versus boundary line of a contact surface to prevent a change in latching effects. The minimized surface may be on the end of the spool or one or both of the end caps. The minimized surface area may be a raised portion of different dimensions.

US Patent:

20050001055, Jan 6, 2005

Filed:

Jul 1, 2003

Appl. No.:

10/609406

Inventors:

Jens Gebhardt - Columbia SC, US

International Classification:

F02M047/02

US Classification:

239088000, 239533300, 239584000

Abstract:

An oil activated fuel injector includes a control valve body with end cap solenoids and a slidably mounted spool. An element is arranged on a portion of the spool for minimizing latching effects of the slidably mounted spool. A drainage system may be formed in the fuel injector for reducing oil accumulation between the end cap and the control valve body. Additionally, a minimized surface area may be formed on the end of the spool or one or both of the end caps. The minimized surface area may be a raised portion of different dimensions also minimizes the latching effects.